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Previous issue date: 2012-04-18 / A critical problem in mature gas wells is the liquid loading. As the reservoir pressure decreases,
gas superficial velocities decreases and the drag exerted on the liquid phase may become
insufficient to bring all the liquid to the surface. Liquid starts to drain downward, flooding the
well and increasing the backpressure which decreases the gas superficial velocity and so on. A
popular method to remedy this problem is the Plunger Lift. This method consists of dropping
the "plunger"to the bottom of the tubing well with the main production valve closed. When the
plunger reaches the well bottom the production valve is opened and the plunger carry the liquid
to the surface. However, models presented in literature for predicting the behavior in plunger
lift are simplistic, in many cases static (not considering the transient effects). Therefore work
presents the development and validation of a numerical algorithm to solve one-dimensional
compressible in gas wells using the Finite Volume Method and PRIME techniques for treating
coupling of pressure and velocity fields. The code will be then used to develop a dynamic model
for the plunger lift which includes the transient compressible flow within the well / Um problema cr?tico em po?os maduros de g?s ? a carga l?quida. Quando a press?o do
reservat?rio diminui, a velocidade superficial diminui e o arrasto exercido na fase l?quida pode
se tornar insuficiente para trazer todo o l?quido para a superf?cie. O l?quido come?a a drenar para
baixo, afogando o po?o e aumentando a contrapress?o, a qual diminui a velocidade superficial,
e assim por diante. Um m?todo popular para remediar esse problema ? o plunger lift. Esse
m?todo consiste em derrubar um plunger na fundo coluna de produ??o com a v?lvula principal
fechada. Quando o plunger alcan?a o fundo do po?o a v?lvula de produ??o ? aberta e o plunger
carrega o l?quido para a superf?cie. Atualmente, os modelos presentes na literatura para prever
o comportamento do plunger s?o simplistas, em muitos casos est?ticos (n?o consideram efeitos
transientes). Assim, esse trabalho apresenta e valida um algor?timo num?rico para resolver
escoamentos em po?os de g?s usando o M?todo dos Volumes Finitos e a t?cnica PRIME para
tratar o acoplamento da press?o e velocidade. Esse modelo ser? usado para desenvolver modelos
din?micos para plunger lift que incluem efeitos transientes e compress?veis nos escoamentos em
po?os
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15691 |
| Date | 18 April 2012 |
| Creators | Assmann, Felipe Pinheiro Mota |
| Contributors | CPF:00644647922, http://lattes.cnpq.br/1379773445574323, Souza, Sandi Itamar Schafer de, CPF:42635926034, http://lattes.cnpq.br/7400466085627528, Marcondes, Francisco, CPF:24811459334, http://lattes.cnpq.br/2663181961083657, Lima, Jo?o Alves de, Paladino, Em?lio Ernesto |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia Mec?nica, UFRN, BR, Tecnologia de Materiais; Projetos Mec?nicos; Termoci?ncias |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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